Hand and Seal

When writing was limited to a few clerks, documents were
authenticated by the impression of the hand dipped in ink, and then the
seal was duly appended. As dipping the hand in ink was dirty, the
impression of the thumb was substituted. We are informed that “scores
of old English and French deeds still exist in which such `signatures'
appear.” Subsequently the name was written, and this writing was called
“the hand.”

Hubert: Here is your hand and seal for what I did.
King John: Oh, when the last account `twixt heaven and earth
Is to be made, then shall this hand and seal
Witness against us to damnation.